This BBC documentary by Jonathan Renouf on abrupt climate change due to ocean circulation tipping is one of the best. From 1999, with top experts like Overpeck, Alley & the late Wally Broecker, it's chillingly current: that risk looks much higher now. https://t.co/ATcIdnZuWT #ClimateChange #OceanCirculation #Documentary #Nospecificcountrycodesarementionedinthetweet.